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What the Colorado River Compact Does <br />Divides the right to beneficially use Colorado River water <br />between the States of the Upper and Lower Basins in <br />perpetuity <br />Apportions the Upper Basin exclusive beneficial use of <br />7.5 million acre -feet (maf) per year <br />Apportions the Lower Basin exclusive beneficial use of <br />7.5 maf, with a right to develop an additional 1 maf per <br />year <br />Requires Upper Division States to “not cause the flow at <br />Lee Ferry to be depleted below an aggregate of” 75 maf <br />over any ten year period